Sausage Breakfast Casserole

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Golden, hearty, and packed with savory flavor, this Sausage Breakfast Casserole is the kind of dish that brings everyone to the kitchen before it’s even out of the oven. With fluffy eggs, seasoned sausage, melty cheese, and tender bread baked together into one comforting slice, it’s the ultimate make-ahead breakfast for busy mornings or relaxed weekend brunches.

Whether you’re hosting overnight guests, planning a holiday breakfast, or simply craving something warm and satisfying, this casserole delivers big flavor with minimal effort. It slices beautifully, reheats well, and tastes just as delicious the next day.

Why You’ll Love This Sausage Breakfast Casserole

• Perfect for feeding a crowd without standing at the stove.
• Easy to prep ahead the night before.
• Customizable with your favorite cheeses or veggies.
• Freezer-friendly and great for meal prep.
• Balanced with protein, dairy, and hearty texture in every bite.

Can I Make Sausage Breakfast Casserole the Night Before?

Absolutely. In fact, letting it rest overnight allows the bread to fully absorb the egg mixture, creating a richer texture and deeper flavor. Simply assemble, cover tightly, refrigerate, and bake fresh in the morning.

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Ingredients

• Breakfast sausage – The star of the dish, adding savory flavor and hearty protein. Use mild or spicy depending on preference.
• Eggs – Provide structure and create the fluffy, custard-like base.
• Milk – Helps create a creamy, tender texture.
• Shredded cheddar cheese – Adds richness and a classic sharp flavor.
• Mozzarella cheese – Melts beautifully and adds stretch and creaminess.
• Day-old bread – Absorbs the egg mixture and gives the casserole body.
• Salt – Enhances the overall flavor.
• Black pepper – Adds subtle warmth.
• Fresh parsley – Optional garnish for brightness and color.

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How To Make the Sausage Breakfast Casserole

Step 1: Cook the Sausage

Brown the breakfast sausage in a large skillet over medium heat, breaking it into crumbles as it cooks. Continue cooking until fully browned and no pink remains. Drain excess grease and set aside to cool slightly.

Step 2: Prepare the Bread Base

Cut the day-old bread into bite-sized cubes. Spread them evenly in a greased baking dish, making sure the bottom is fully covered for an even texture.

Step 3: Mix the Egg Custard

In a large mixing bowl, whisk together the eggs, milk, salt, and black pepper until smooth and well combined.

Step 4: Assemble the Layers

Sprinkle the cooked sausage evenly over the bread cubes. Add the shredded cheddar and mozzarella cheeses on top. Slowly pour the egg mixture over everything, ensuring all the bread pieces are coated.

Step 5: Rest and Bake

Allow the casserole to rest for at least 20 minutes, or cover and refrigerate overnight. Bake in a preheated oven until the center is set and the top is golden brown. Let it cool slightly before slicing.

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Serving Sausage Breakfast Casserole for Brunch or Meal Prep

This casserole comfortably feeds about 8 people, making it ideal for brunch gatherings, holiday mornings, or weekly breakfast meal prep. Serve it with fresh fruit, yogurt, or a light green salad for balance. A drizzle of hot sauce or a spoonful of salsa also pairs beautifully with the savory flavors.

If you’re planning a breakfast spread, it complements sweet dishes like muffins or cinnamon rolls wonderfully.

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How to Store Sausage Breakfast Casserole Properly

Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual slices in the microwave or warm larger portions in the oven until heated through.

To freeze, wrap slices tightly in plastic wrap and place them in a freezer-safe container. Freeze for up to 2 months. Thaw overnight in the refrigerator before reheating for best texture.

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Frequently Asked Questions

1. Can I use a different type of sausage?

Yes, you can use turkey sausage, chicken sausage, or even plant-based sausage alternatives. Just ensure it’s fully cooked before assembling the casserole.

2. Can I add vegetables?

Definitely. Bell peppers, onions, spinach, or mushrooms work beautifully. Sauté vegetables first to remove excess moisture before adding them.

3. How do I know when it’s done baking?

The center should be set and not jiggly. A knife inserted in the middle should come out clean.

4. Can I make this without bread?

You can substitute hash browns or diced potatoes for a different texture. If you love potato-based casseroles, you might also enjoy this variation.

5. Why is my casserole watery?

Excess moisture usually comes from vegetables that weren’t pre-cooked or from not allowing the casserole to rest before baking. Letting it sit helps the bread absorb the liquid properly.

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Want More Breakfast Casserole Ideas?

If you love this Sausage Breakfast Casserole, you’ll probably enjoy these other comforting favorites:

• Crack Breakfast Casserole – https://lifewithlivia.com/crack-breakfast-casserole/
• Hashbrown Casserole – https://lifewithlivia.com/hashbrown-casserole/
• Apple Cinnamon French Toast Casserole – https://lifewithlivia.com/apple-cinnamon-french-toast-casserole/
• Freezer Breakfast Burritos – https://lifewithlivia.com/freezer-breakfast-burritos/

For even more daily comfort food inspiration, browse more recipes on my Pinterest here: Life With Livia https://www.pinterest.com/dadaking0065/

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Let me know in the comments how yours turned out. Did you add veggies or keep it classic? Did you make it ahead overnight?

I love hearing how you make these recipes your own — and I’m always happy to help if you have questions!

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